Insulator



Sept. 29, 1931.

P. J. KAYATT 1,825,319

INSULATOR Filed Feb. 20, 1928 [fizz] INVENTOR. Plu'llgv Jfi/Tayah ATTORNEY Patented Sept. 29, 1931 UNITED STATES PATENT OFFICE PHILLIP J. KAYATT, OF YONKERS, NEW YORK ASSIGNOR TO AMERICAN NEON LIGHT CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE INSULATOR Application filed February 20, 1928. Serial No. 255,563.

My invention relates to electrode insulators and more especially to insulators for use in connection with luminescent tubes,

In my copending application for insulators, Serial No. 245,651 filed January 10,

1928, a form of such an insulator is despecification anddrawings. In the draw- Fig. 1 is an elevation in section of a preferred form of the assembled insulator and electrode structure.

Fig. 2 is an elevation of the insulator shell.

Fig. 3 is a top plan view of Fig. 2.

Fig. at is a perspective of the bushing.

Fig. is a section through A-A of Fig. 2.

In Fig, 1, the insulator shell is shown at 1 with a cap 2 which screws down and closes the insulator as shown. At 3 is the removable bushing through which passes the leadin cable or wire 4 and the inner end of this wire connects with the resilient member 5 by means of the boltand nut 6, passing through the lip 7 of the bushing. The electrode chamber is indicated at 8 upon the upper end of which is the conducting element 9 which not only serves as a seat for the resilient member 5 but also passes current from that member to the electrode (not shown) within the chamber 8. For ventilation, I may provide openings in the shell such as at 10 and to attach the insulator to the apparatus of which the electrode chamber 8 forms a part, I have a series of holes 11 in the flange of the shell.

In the shell 1 is a seat 12 which is shown in Figs. 2, 3, and 5. This seat is trough shaped Or rectangular and is at an angle with respect to the side of the insulator shell and has an outer extension 13 and an inner extension 14. The sides of the inner extension reach to the top of the shell as at 15 hile those 'of theouter extension reach only part way as at 16. Within this seat fits the bushin 3 shown in perspective in 4. This tion 17 adapted to fit in the seat with the offsets 18 and 19 projecting down over the ends of the extensions 13 and. 14: and the offset 20 extending upward so that the cover 2 just clears it when the cover engages the threads 21 on the insulator shell. The straight sides 22 of the bushing abut the Walls 15 and 16 of the seat 12.

When the insulator is assembled as in Fig. 1, it will be seen that a very rigid, weather-proof and simple structure is formed. By the simple unscrewing of the cover, 2, the bushing 3 with its connections may be lifted out of its seat and the electrode structure 8 within the insulator shell 1 is completely accessible. Furthermore, the upward slant of the seat, the close fit of the bushing in this seat and the overlapping of the cap 2 with offset 20 of this bushing effectually prevents the entrance of moisture or dirt to the inside of the insulator so that the lead-in wire 4. and all of the connections and contacts to the electrode structure are fully protected.- Also, it will be seen that the structure of the insulator is unusually rigid for the reasons that as the offsets 18 and 19 of the bushing project downwardly over the ends of the extensions 13 and 14 of the seat 12, (Fig, 2) all endwise motion of the bushing is prevented and the straight sides 22 (Fig. 4) abutting the sides 15 and 16, any sidewise motion is impossible. In addition, when the cap 2 is screwed down,

its lower edges will bear on the surface 24 of the bushing as shown in Fig. 1; this sur" face rising slightly above the sides 16 of the seat extension 14. In so bearing on the surface, 24, the cap forces the bushing firmly in its seat and securely retains it there.

An important feature of my invention is that the insulator shell has a seat upon which is a bushing held in place by the insulator cover. I am aware that this may be accomplished although changes and modifications are. made in the preferred form just described and I include all such changes ushing has a stralght por ing a seat thereon with inner and outer extensions and upwardly extending sides,

a bushing adapted to fit in said seat, current carrying means passing through said bushing, a resilient member connecting with the current carrying means and a ca closing said shell and retaining the bushing 1n its seat.

2. insulator having a shell member with an inwardly and outwardly extending seat formed thereon, a bushing adapted to fit in said seat and having current carrying means passing through and connecting with a resiiient member at the extremity of said bushing and a cap adapted to close said shell member and retain said bushing in its seat.

3. An insulator for the electrode-end of a luminescent tube, said insulator comprising a shell, a trough-like seat on the wall of said shell at its mouth extending transversely to and overhanging said wall, an electrical-contact supporting bushing fitting down into said trough-like seat, and a closure for the mouth of the shell holding the bushing in the seat.

4:. An insulator for the electrode-end of a luminescent-tube, said insulator comprising a shell, a trough-like seat on the wall of said shell at its mouth extending transversely to and overhanging said wall, an electrical-contact supporting bushing fitting down into said trough-like seat, and a closure for the mouth of the shell holding the bushing in the seat; the bottom of said trough-like seat and of said bushing being inclined so that the end of the seat within the shell is nearer than its outer end to the plane of the mouth of the shell.

5. An insulator for the electrode-end of a luminescent tube, said insulator comprismovement relatively to each other.

rua 1928.

PHILLIP J. KAYATT. 

